Individual hair-spring-stud index for watches and clocks.



c. TESKE. INDIVIDUAL HAIR SPRING STUD INDEX FOR. WATCHES AND CLOCKS.

APPLICATION FILED APILQ, 1909. v

Patented Nov. 23, 1909.

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NT OFFICE.

CHARLES TESKE, OF RAY, NORTH DAKOTA.

INDIVIDUAL HAIR-SPRING-STUD INDEX FOR WATCHES AND CLOCKS.

Specification of Letters Patent.

Patented Nov. 23, 1909.

Application filed April 9, 1909. Serial N 0. 488,843.

T 0 all whom it may concern:

Be it known that I, CHARLES TESKE, a citizen of the United States,residing in Bay, in the county of Williams and State of North Dakota,have invented certain new and useful Improvements in Individual Hair-Spring- Stud Indexes for lVatches and Clocks, of which the following isa specification.

This invention relates to hairspring stud indexes for time pieces, andis-particularly adapted for providing an index for determining theproper angular position of the hairspring stud of each individual watchor clock relative to the roller jewel for the engagement of theescapment lever and by means of which index the proper relativepositions of these parts may be reestablished upon replacing thehairspring with its stud and collect upon the balance staif after theirremoval.

This invention has reference to an index to be permanently applied tosome part of each watch or clock movement, and by which the positions ofthe roller jewel and hairspring stud relative to each other and to thebalance stafl may be indicated. So that in the event of its becomingnecessary to remove the hairspring with its stud from the balance or toreplace a broken balance stafi with a new one or if for any other causeany of the parts of the balance wheel mechanism are taken apart theposition of the stud upon the hairspring may be so positioned inrelation to the impulse pin, which is generally the roller ewel, thatwhen the parts are replaced there will be no tension upon the hairspringwhen the impulse member is in alinement with the balance staff and theaxis of the escapement lever.

In the drawings accompanying and form ing a part of this specificationFigure 1 illustrates the under side face of a balance cock carrying thebalance wheel and show? ing the escapement lever in dotted lineposition. Fig. 2 is a similar view of the balance cock, the balancewheel being shown in verted and the stud removed from its bearing in thecock; this illustrates the practical application of my invention to awatch movetime pieces have left the factories. -In the event that itbecomes necessary for any cause to remove the hairspring with its studfrom the balance stalf, such as testing the parts of the balance forpoise each time the watch is cleaned, or it becomes necessary to replacea broken balance staff by a new one, or if a new hairspring is to be puton or a new collet is to be put in place and a new roller jewel put in,or any of the other repairs to this part, the watch repairer has to dealwith points of nicety in which he has to expend a considerable amount oftime to replace the hairspring with its stud on the staif so that theroller jewel will correctly interline with the lever slot in order thatthe time piece may be in correct beat again. In most cases the watchrepairer has to correct several times the hairspring with its stud onthe balance staff before he finally reestablishes the exact position ofthe stud to make the time piece beat evenly, thus wasting considerableValuable time, and as a matter of fact but few repairers are able to getthe correct adjustment.

While a watch with a balance that is out of beat may run and take a goodmotion, it is the observation of experienced watch makers that an out ofbeat balance acts on the timing of a watch equivalent to an un poisedbalance, disturbing its equilibrium in certain positions and thusupsetting a very essential requirement in watches, which have taken timeand care for the manufacturer to accomplish, namely the adjustment forvarious positions. The out of beat error is often neglected because thegreat importance of having a balance in perfect beat is not alwaysrealized. Besides being an impediment to the timing for variouspositions, the balance that is out of beat always remains at astandstill when run down, and must always be started off when rewound;whereas the balance that is in perfect beat will begin its oscillationsimmediately after the main spring is brought into action.

To overcome the above mentioned objections 1 have provided my improvedindividual hairspring stud index. Each time piece will carry in itself ahairspring stud index absolutely correct for itself and made by themanufacturer as a part of the time piece which shall remain with it.

The index will be placed 011 some member of the framing of the timepiece and in watches it is most convenient to place this index on theunderside face of the balance cock 7, that is the face of this cockwhich will engage the main plate of the watch movement. This cock isshown in the present instance as provided with the usual studs 8, 8, 8for positioning the cock upon the plate, and it is also provided withthe usual screw hole 9 by which it may be secured in position. Thebalance wheel, now having reference to Figs. 1 and 2, is designated bythe reference character 10, and its balance staff 11 is shown asprovided with a collet 12 to which is fastened a hairspring 13. Thebalance staff will be seated in the usual bearing 14L in the balancecock, and the hairspring stud 15 will, when the balance wheel is inproper position, be seated in a socket 16 and held in position thereinby means of the set screw 17. The collet and hairspring are carried uponone side of the balance wheel and a roller table 18 is carried upon theother side of the wheel. The roller table carries a roller jewel 19which engages a lever 20. When the parts are in their proper positionthe roller jewel 19 will be in alinement with the axis of the balancestaff 11 and the axis 21 of the lever, that is when there is no tensionon the main spring. This will afford proper beat for the watch.

In Figs. 1 and 2, the balance cock 7 is shown provided with a pair ofsockets 22 and 23 for receiving the roller jewel and the balance staffrespectively of the particular balance wheel of such cock. The cock alsocarries an index in the form of a line 24: to indicate the properposition of the hairspring stud relative to the and jewel of thatparticular balance wheel when such staff and ewel are accuratelypositioned by such sockets. The roller jewel sockets and the balancestaff sockets are located for accurately positioning the staff and jeweleach in respect of the other and this in connection with the meansprovided therefor will indicate the position which should be occupied bythe hairspring stud of that particular time piece in respect of thestaff and roller jewel thereof.

lVhen the parts have been placed in the sockets of the index, asindicated in Fig. 2, the collet and hail-spring are then uppermost, andif any adjustment of the collet or of the stud has to be made there willbe nothing in the way of the workman to prevent his effecting the properadjustment, that is such an adjustment as will bring the center of thehairspring stud over the index line 2%.

In Fig. 3 a form of duplex escapement balance wheel 10 is shown, whichis pro vided with a hair-spring 13 having a hairspring stud 15 and animpulse pin it), which must always in each individual watch bear thesame relative angular relation to each other, having the balance staff11 for the center. In this instance there are shown sockets 22 and 23for the pin and staff respectively, and an index line 24: for indicatingthe posit-ion of the stud, and a line 26 for showing the position of theslot in the staff.

It is self evident now that in case the hairspring with its stud has tobe separated for any cause from the balance staff, whereby the correctbeat of the balance is lost, that the same can be easily and absolutelycorrectly reestablished by simply placing the balance staff and rollerjewel in the designed holes and taking the hair-spring wit-h its colletand stud and placing them in such a position upon the balance staff thatthe hairspring stud will be above the index line, and then pressing thecollet down upon the balance staff. The collet until the parts areproperly secured in position may be adjusted about the balance staffuntil the correct position of the stud relative to the index line isestablished.

Time pieces provided with such indexes carry in themselves theabsolutely correct means whereby the correctbeat of such time pieces canbe readily reestablished if dis;- turbed for any cause.

Having described my invention 1. claim:

1. A hair-spring stud index for time pieces, embodying a balance cock, asocket in the balance cock for receiving and accurately positioning theparticular balance staff of said cock, a socket in said cock forreceiving and engaging the roller jewel of said cock, and an index onsaid cock for the hairspriug stud.

2. A device of the character specified, embodying a balance cock, anindex on the cock for the hairspring stud, and sockets in the balancecock respectively located for receiving and accurately positioning thebalance staff and the roller jewel of the particular balance wheel ofsaid cock in respect of said hairspring stud index.

A hairsprmg stud index for a time piece embodying a framing member ofthe time piece a pair of sockets in the said member stud of that timepiece in respect of the staff for receiving the balance staff and theroller and roller jewel thereof.

jewel of such time piece and located for accurately positioning each inrespect of the CHARLES TESKE' other, and means on the said member prop-Witnesses:

erly located in respect of said sockets for THOMAS WHITE, indicating theposition of the hairspring U. C. MUNSON.

